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If you intend to melt the snow for drinking water, you can__extra purity by running it through a coffee filter.
Aassure
Binsure
Creassure
Densure
Some Martian rock structuers look strikingly like structures on Earth that are known__ by microbes.
Ahaving been created
Bbeing crerted
Cto have been created
Dto be created
At that moment, with the crowed watching me, I was not afraid in the ordinary sense, as I __if I___alone.
Awould have been...had been
Bshould be...had been
Ccould be ...were
Dmight have been...were
Timothy Ray, Brown, the first man cured of HIV, initially opted against the sten cell transplant that__history.
Acould have later made
Bshould have made later
Cmight make later
Dwoula later make
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